Adaptive Overhearing in Two-Way Multi-Antenna Relay Channels

被引：49
|
作者：
Li, Chunguo [1 ]
Yang, Hyun Jong [2 ]
Sun, Fan [3 ]
Cioffi, John M. [4 ]
Yang, Luxi [1 ]
机构：
[1] Southeast Univ, Sch Informat Sci & Engn, Nanjing 210096, Jiangsu, Peoples R China
[2] UNIST, Sch ECE, Ulsan, South Korea
[3] Qualcomm Atheros, San Jose, CA 95134 USA
[4] Stanford Univ, Dept EE, Stanford, CA 94305 USA
来源：
IEEE SIGNAL PROCESSING LETTERS | 2016年 / 23卷 / 01期
基金：
新加坡国家研究基金会; 国家高技术研究发展计划(863计划);
关键词：
Adaptive overhearing; amplify-and-forward (AF); asymmetric two-way relay channel; multi-antenna relay; multi-user two-way relay;
D O I：
10.1109/LSP.2015.2504559
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An adaptive overhearing protocol is proposed for the two-way multi-antenna-relay network composed of a base station (BS), relay, and two user equipments (UEs), where one UE is in the uplink (UL) transmission mode (UE-Tx) while the other is in the downlink (DL) reception mode (UE-Rx). Specifically, UE-Rx not only receives the DL signal transmitted by BS but also overhears the signal transmitted by UE-Tx, and exploits the overheard signal to improve the detection performance. The transmit adaptive weights of UE-Tx over the two times slots and the precoding matrix at the relay in the second time slot are jointly optimized via the proposed iterative algorithm in the sense of maximizing the minimum signal-to-interference-plus-noise-ratio. Numerical results show that the proposed joint design provides significant sum-rate gain over the existing overhearing scheme.
引用
收藏
页码：117 / 120
页数：4
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